<template>
  <div class="app-container">
    <!-- <h2 style="text-align: center;">发布新课程</h2> -->
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

    <el-button type="text" @click="openChapterDialog">添加章节</el-button>

    <el-dialog :title="chapterDialogTitle" :visible.sync="dialogFormVisible">
      <el-form :model="chapter">
        <el-form-item label="章节标题" :label-width="formLabelWidth">
          <el-input v-model="chapter.title" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="章节排序" :label-width="formLabelWidth">
          <el-input-number v-model="chapter.sort" :min="0" autocomplete="off"></el-input-number>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 章节 -->
    <ul class="chanpterList">
      <li
        v-for="chapter in chapterVideoList"
        :key="chapter.id">
        <p>
          {{ chapter.title }}
          <span class="acts">
            <el-button type="text" @click="openVideoDialog(chapter.id)">添加课时</el-button>
            <el-button type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
            <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
          </span>
        </p>
        <!-- 视频 -->
        <ul class="chanpterList videoList">
          <li
            v-for="video in chapter.children"
            :key="video.id">
            <p>
              {{ video.title }}
              <span class="acts">
                <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
                <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
              </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>

    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" :title="videoDialogTitle">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.isFree">
            <el-radio :label="true" value="true">免费</el-radio>
            <el-radio :label="false" value="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
          <!-- TODO -->
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyVideo'"
            :limit="1"
            class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
              <i class="el-icon-question"/>
            </el-tooltip>
          </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>

    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

  </div>
</template>
<script>
import chapter from "@/api/edu/chapter";
import video from "@/api/edu/video";

export default {
  data() {
    return {
      chapterDialogTitle: '',
      videoDialogTitle: '',
      chapterVideoList: [],
      courseId: '',
      dialogFormVisible: false,
      dialogVideoFormVisible: false,
      formLabelWidth: '120px',
      chapter: {
        title: '',
        sort: 0,
        courseId: ''
      },
      video: {
        title: '',
        sort: 0,
        isFree: 0,
        videoSourceId: '',
        courseId: '',
        videoOriginalName: ''
      },
      saveBtnDisabled: false, // 保存按钮是否禁用
      saveVideoBtnDisabled: false,
      fileList: [],//上传文件列表
      BASE_API: process.env.VUE_APP_BASE_API  // 接口API地址
    }
  },
  created() {
    // 获取路由里面的id
    if (this.$route.params && this.$route.params.id) {
      this.courseId = this.$route.params.id
      this.getAllChapterVideo()
    }
  },
  methods: {
    // 点击确定调用的方法
    handleVodRemove() {
      video.deleteAlyVod(this.video.videoSourceId)
        .then(res => {
          this.$notify({
            type: 'success',
            message: '删除成功!',
            showClose: false
          })
          // 文件列表清空
          this.fileList = []
          this.video.videoSourceId = ''
          this.video.videoOriginalName = ''
        })
    },
    // 点击x调用这个方法
    beforeVodRemove(file, fileList) {
      return this.$confirm(`确定移除${file.name}?`, '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.handleVodRemove()
      })
    },
    // 上传成功调用方法
    handleVodUploadSuccess(response, file, fileList) {
      this.video.videoSourceId = response.data.videoId
    },
    handleUploadExceed() {
      this.$notify.error('想要重新上传视频，请先删除已上传的视频')
    },
// ===========================================================小节操作===================================================
    // 删除小节
    removeVideo(videoId) {
      video.deleteVideo(videoId)
        .then(res => {
          this.$confirm('此操作将删除该章节, 是否继续?', '警告', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).then(() => {
            this.$notify({
              type: 'success',
              message: '删除成功!',
              showClose: false
            })
            this.getAllChapterVideo()
          })
        })
    },
    // 修改小节弹框数据回显
    openEditVideo(videoId) {
      this.videoDialogTitle = '修改课时'
      this.dialogVideoFormVisible = true
      video.getVideo(videoId)
        .then(res => {
          this.video = res.data.video
          console.log(res)
        })
    },
    // 打开弹窗，准备添加小节
    openVideoDialog(chapterId) {
      this.initForm()
      this.videoDialogTitle = '添加课时'
      this.dialogVideoFormVisible = true
      this.video.chapterId = chapterId
      this.video.courseId = this.courseId
    },
    // 添加小节
    addVideo() {
      video.addVideo(this.video)
        .then(res => {
          // 关闭弹窗
          this.dialogVideoFormVisible = false
          // 提示
          this.$notify({
            type: 'success',
            message: '添加成功',
            showClose: false
          })
          // 刷新页面
          this.getAllChapterVideo()
        })
    },
    // 修改小节
    updateVideo() {
      video.updateVideo(this.video)
        .then(res => {
          // 关闭弹框
          this.dialogVideoFormVisible = false
          // 提示信息
          this.$notify({
            type: 'success',
            message: '修改成功',
            showClose: false
          })
          // 刷新页面
          this.getAllChapterVideo()
        })
    },
    // 添加或修改小节
    saveOrUpdateVideo() {
      if (this.video.id) {
        this.updateVideo()
      } else {
        this.addVideo()
      }
    },
// ===========================================================章节操作===================================================
    // 删除章节
    removeChapter(chapterId) {
      this.$confirm('此操作将删除该章节, 是否继续?', '警告', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        chapter.deleteChapter(chapterId)
          .then(res => {
            this.$notify({
              type: 'success',
              message: '删除成功!',
              showClose: false
            })
            this.getAllChapterVideo()
          })

      })
    },
    // 修改章节弹框数据回显
    openEditChapter(chapterId) {
      this.dialogFormVisible = true
      this.chapterDialogTitle = '修改章节'
      chapter.getChapter(chapterId)
        .then(res => {
          this.chapter = res.data.chapter
        })
    },
    // 开嵌套表单
    openChapterDialog() {
      this.initForm()
      this.chapterDialogTitle = '添加章节'
      // 打开弹框
      this.dialogFormVisible = true
    },
    // 添加
    addChapter() {
      this.chapter.courseId = this.courseId
      chapter.addChapter(this.chapter)
        .then(res => {
          // 关闭弹框
          this.dialogFormVisible = false
          // 提示信息
          this.$notify({
            type: 'success',
            message: '添加成功!',
            showClose: false
          })
          // 刷新页面
          this.getAllChapterVideo()
        })
    },
    // 修改
    updateChapter() {
      chapter.updateChapter(this.chapter)
        .then(res => {
          // 关闭弹框
          this.dialogFormVisible = false
          // 提示信息
          this.$notify({
            type: 'success',
            message: '修改成功!',
            showClose: false
          })
          // 刷新页面
          this.getAllChapterVideo()
        })
    },
    // 添加或修改
    saveOrUpdate() {
      if (this.chapter.id) {
        this.updateChapter()
      } else {
        this.addChapter()
      }
    },
    initForm() {
      this.video =  {
        title: '',
          sort: 0,
          isFree: 0,
          videoSourceId: '',
          courseId: '',
          videoOriginalName: ''
      }
      this.fileList = []
    },
    // 根据课程id查询章节和小节内容
    getAllChapterVideo() {
      chapter.getAllChapterVideo(this.courseId)
        .then(res => {
          this.chapterVideoList = res.data.allChapterVideo
          console.log(this.chapterVideoList)
        })

    },
    previous() {
      this.$router.push({path: `/course/info/${this.courseId}`})
    },
    next() {
      this.$router.push({path: `/course/publish/${this.courseId}`})
    }
  }
}
</script>

<style scoped>
.chanpterList {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.chanpterList li {
  position: relative;
}

.chanpterList p {
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}

.chanpterList .acts {
  float: right;
  font-size: 14px;
}

.acts {
  padding-right: 30px;
}

.videoList {
  padding-left: 50px;
}

.videoList p {
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}
</style>
